I am not from Salt Lake City, but my aunt recently moved there for her husband's job. When I went to visit we went out to eat at Caffe Molise in downtown, right across the street from The Marriott Downtown. Its a small italian restaurant with no peanuts (I'm not sure about tree nuts because I am not allergic). I also ate out at Olive Garden and another italian restuarant chain but I forgot the name of it. I find that Italian's rarely use peanuts/peanut oil so those restaurants seem to be my safe choice since I only avoid TN. Let me know if you find any other restaurants because I am heading out there again in November.

There's this one place we stopped at when we were in SLC in May. Golden Corral, I think it was called. It is a buffet that has all food prep areas visible to the customers. Each section is separate. The dessert section wasn't safe, but the meat, salad bar, vegetable areas were all okay.